If transporting mass explosives: Question If transporting mass explosives: Answers The vehicle must always be placarded. The vehicle must be placarded, but only if transporting more than 200 pounds of the material. The vehicle does not need to be placarded. Explanation Attach the appropriate placards to your vehicle before driving. A vehicle must be placarded if it is carrying mass explosives in any amount. This questions appears in the following tests: California HazMat
